Air-register for oil-burners.



L. D. LOVEKIN.

AIR REGISTER FOR OIL BURNERS.

APPLICATION FILED MAY 10, I917.

1,290,607. Patented Jan. 7,1919.

2 SHEETSSHEET I.

. I uwzwrofv f R gfiw/mp I 53 M L. D. LOVEKIN.

AIR REGISTER FOR OIL BURNERS.

APPLICATION FILED MAY 10, I917;

Patented Jan. 7, 1919.

2 SHEETSSHEET 2.

INVMTOR WITN5 5:

Lu'mnn n; Lovnnm, or PHILADELPHIA, rENNsYLvANIa, nssroNoia 'ro ,scno'r'rn a KoEnrINe COMPANY, or PHILADELPHIA, PENNSYLVANIA, a ooaroaa'rron or PENNSYLVANIA.

AIR-REGiSTER ron oIL-BonNEas.

meat.

To all whom it may concern: 4

Be it known that I, LUTHER D. LOVEKIN,

a citizen of the United States of America,

and resident of Philadelphia," in the county of Philadelphia and State ofPennsylva nia, have invented certain new and useful improvements in Air-Registers for Oil- Burners, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My present invention relates to fluid fuel burners and particularly to. the oil burners for large steam generating furnaces of the characterize my invention are pointed out with particularity in the claim's'annexed to and forming a partof this specification. For a better understanding of the invention, how: ever, and the advantages possessed by it, reference should be had to-the accompanying drawings and descriptive matter in which I have illustrated and described a preferred embodiment of my invention;

Of the drawings:

Figure 1 is a sectional elevation of a por- I tion of a furnace equipped with my inven-' tion;

Fig. 2 is a front elevation of the air register proper;

Fig.3 1s a partial section taken on the line 33 of Fig. 1; and

Fig. 4 is a partial section taken on the line H of Fig. l. V y

In the drawings: A represents the front wall of the combustion chamber of a steam generating boiler furnace, and A the aper ture therein: through which the fluid fuel and airare admitted.- Secured'to the wall A at the margin of the erture A is a casing or housing member shown as annular in form and provided. with a conical air and fuel mixing chamber B, which is directly open at its larger end to the furnace com- Specification of Letters Patent.

7 Application filed may 10, 1917 Serial No. 167,848.

Patented Jan. *?,119.

bustion chamber proper and may be regarded as an extension thereof. small end the housing member B is formed with an inlet-opening B through which ex tends the fuel supply nozzleC' which may be'of the usual form and which is adapted to discharge fluid fuel in a conical jet, the apex At its v of which is-closer to the combustion chamber proper than is the apex of the conical chamber B. Surrounding the chamber B is an annular equalizing chamber B into which air passes from the furnace room through ports B and out of which the air is (hecharged into the chamber B through elongated ports B. V

In the preferred construction illustrated the chambers B and B are separated from one another by a conical wallformed of a series of blades or vanes h, which are connected with the housing member B proper by means of an annular member 6' to which the outer ends of the blades are secured by bolts or screws 5 and which is connected in turn to the housing member B by bolts or screws 6 At their opposite ends the blades 6 are thickened at I) to abut against one another and are secured to an annular member b? by bolts or screws I). The side walls of the elongated ports B are formed by the adjacent sides of adjacent'blades b, which are spaced apart for this purpose between the thickened end portions 6 and the annular member 6'. The air. register e1e-. ment-composed in the particular construction illustrated on the annular members 5' and b and blades 6 is bodily attached to the housing B by the screws 11 and may be bodily removed-from the housing B when the screws 6 are taken out.

The sidewalls of each port 5B are shaped to deliver sheet like jets of air tangential to a cone substantially coaxial'with, and of substantially the same taper as the conical fluid fuel jet, but having its apex somewhat farther in the chamber B than the apex of the conical fuel jet. -With the described arrangement ,the jets of air intersect the fuel jet adjacent the periphery of the latter.

This I have found advantageous in securing.

the desired combustion. The inner edges of the walls of the ports B are preferably substantially parallel to the surface-elements of the azonical fuel jet, as this contributes to uniform combustion conditions. Advantageousiy the outer edges of'the blade 5 are rounded ofi' as indicated at b to facilitate the desired regularity of air admission from the chamber B to the various ports B and an avoidance of eddy currents. 4

A conical damper D is rotatively mounted on the outer surface of the member B being held against axial displacement by retaining clips E secured to the member B. The member D is formed with a series of ports D which correspond to the ports B and may be moved, into and out of register with D to insure the proper supply of air tothe combustion chamber of the furnace. The

, draft and air supply provisions are advantageously so regulated as to deliver the air against the fluid fuel jet with a velocity greater than the velocity of the fuel, as this tends to minimize the possibility of back firing. I i

The described arrangement for supplying air to the chamber B through the ports 13 insures a highly desirable uniformity in dis-- tribution aboutthe axis of the chamber B of the air thus supplied to this chamber. and a desirable uniformity in the direction of flow of the jets of air discharged through the ports B notwithstanding variations in the amount of air passing through theports B The amount of air passed into the chamber 13' through the ports'B may be varied at will by varying the admission through the ports B to the equalizing chamber B without obstructing or altering the shape of the ports B The shape and direction of the air jets discharged through the ports 13 is thus unaffected by the volume of air discharged and the apparatus operates with different-volumes of air supplied without any such wire drawing or veddy efiects as would result from a regulation of the amount of air supplied by the ports B by throttling or changing the shape of these ports.

The described formation of the cage or ported partition separating the chambers B and B by the bars I) makes possible an accurate and uniform shaping of the ports" B at a relatively, low cost of manufacture. The bars 5 may readily be cast with suflicient uniformity in shape and smoothness to make unnecessary all, or at least any material machining or grinding, other than the tapping of the bolt holes in their ends.

While the proportions may be varied to meet different conditions I may state that I have obtained excellent results in practice with apparatus proportioned as shown in the drawings in which the width of the inner edges of the ports B is uniformly one fourth inch from one end to the other of each port. The side walls of the ports B are oblique to the axis of the. conical interior of the'cage element in which the ports are formed and are preferably of a depth transverse to the length of the ports which is appreciably greater (see Fig. 3) than the width of theinner edges of the ports. Advantageously a relatively small amount of air is supplied to the chamber B in the form of jetsdirected toward the axis of the fuel jet cone near the apex of the latter through the small cylindrical ports B The air thus provided tends to prevent carbon deposits about the fuel supply nozzle. These orts may advantageously lead from an auxiliary equalizing'chamber B receiving air from the furnace room through ports B controlled by an angularly adjustable conical damper F secured in place by retaining clips G. The use of the pressure equalizing chamber B makes the distribution and direction of admission of air passin into the. chamber B through the .ports 8 independent of ,the extent to which the ports B are thr0ttled..

In accordance with'the provisions of the statutes I have illustrated and described above the'best form of my invention now known to me.

Having now described my invention what I claim as new and desireto secure by Letters Patent, is:

1. In fiufd fuel combustion apparatus, the combination of a casing provided with a conical chamber, elongated unobstructed ports in the Wall of said chamberextending parallel to the length of the surface elements thereof, and an equalizing chamber surround ng said conical chamber and connected therewith through said ports, regulable means for supplying air to said equalizing chamber and means for discharging into the first mentioned chamber a fluid fuel jet in the form of a cone substantiall coaxial with the wall ofthe first mentloned chamber and having substantially the same taper as said chamber.

2. In fluid fuel combustion apparatus, the

combination of a casing provided with av conical chamber, elongated unobstructed ports in the wall of said chamber extending parallel to the length of the surface elements thereof and having their side walls oblique to the axis of said chamber, and an equalizing chamber surrounding said conical chamber and connected therewith through said ports, regulable means for supplying air to said equalizing chamber and nieans'for discharing into the first mentioned chamber a fluid fuel in the form of a cone, substantially coaxial with the wall of the first mentioned chamber and having substantially the same taper as said-chamber,t all so relatively arranged that the air jet's discharged by said ports intersect said fuel 'jet' and are tangential to a, cone substantially coaxial with the wall of the first mentioned chamber, and having substantially the same taper as said chamber.

3. In fluid fuel apparatus, a casing provided, with a conical chamber, elongated ports in the wall of said chamber extending parallel in length to the surface elements thereof, an equalizing chamber surrounding said conical chamber and conuected thereto by said ports, distributed air admission ports in the outer wall of saidcasingopening to said equalizing chamber,

a conical damper mounted on said casing and controlling the last mentioned ports, and means for discharging a fluid fuel jet into said chamber.

4. In fluid fuel combustion apparatus, a casing provided with a conical chamber, an

annular equalizing chamber surrounding said conical chamber adjacent its apex, a main air equalizing chamber surrounding said conical chamber at a greater distance from said apex, distributed ports connecting the first mentioned equalizing chamber and said conical chamber and directed toward the axis of the conical chamber, elongated ports connecting the main equalizing chamber and conical chamber and extending parallel to the surface elements of said coni-' cal chamber and having side walls inclined thereto to secure a discharge into the conical chamber tangential to a cone substantially coaxialtherewith, means for delivering a conical fluid jet into said conical chamber with its axis substantially coincident with the axis of said chamber and its apex adjacent the apex of the chamber, and regulable means controlling the supply of air to said main equalizing chamber.

5. In fluid fuel combustion apparatus the combination of a casing provided with a conical chamber and an equalizing chamber surrounding said conical chamber, and comprising a conical cage separating the two chambers and formed of bars secured together at their ends and spaced apart between their ends to form elongated ports connecting the two chambers and extending parallel to the surface elements of the in ner' wall of said cage and regulable means for supplying air to said equalizing cham- '6. In fluid fuel combustion apparatus the combination of a casing provided with a conical chamber, elongated unobstructed ports in the wall of said chamber extending parallel to the length of the surface elements thereof and each of substantially uniform breadth at its inner edge from one end to the other, said ports having side walls of a depth substantially greater than the breadth of the port. I

7. In fluid fuel combustion apparatus a chambered housing formed with an opening in one side and in combination therewith a hollow conical element inserted in said housing and formed with peripheral ports and having its larger end secured to said housing at the margin of said opening, said housing and conical element being shaped and proportioned to provide a pressure. equalizing chamber in the housing surrounding said conicahelement, and said housing being formed with air inlet openings in its sides and with an opening through which.

fuel may be discharged into said conical element through the smaller end of its cone.

LUTHER D. LOVEKIN. 

